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Analog Devices Inc. AD7450AR
- Part No.:
- AD7450AR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD7450AR.pdf
- Description:
- IC ADC 12BIT DIFF-IN 1MSPS 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,396
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Product details
Overview
AD7450AR from Analog Devices is a 12-bit, 1 MSPS successive approximation ADC with fully differential analog input, 3 V/5 V single-supply operation, and SPI/QSPI-compatible serial interface. It features 70 dB SINAD at 300 kHz, 20 MHz full-power bandwidth, and 1 µA max power-down current-designed for precision transducer interface and battery-powered data acquisition.
For engineers reviewing the AD7450AR datasheet, AD7450AR pinout, AD7450AR application, or AD7450AR equivalent, this page delivers verified specifications, SOIC-8 package mapping, functional pin roles, real-world use scenarios in motor control and portable instrumentation, and two validated alternative parts with documented technical and application differences.
Technical Context
The AD7450AR implements a charge-redistribution SAR architecture with dual capacitive DACs and an integrated differential track-and-hold amplifier-enabling no-pipeline-delay conversion and 20 MHz input bandwidth. Its sampling is triggered by CS falling edge, and conversion timing is fully governed by SCLK frequency (up to 18 MHz).
Reference voltage is externally applied to VREF (100 mV–3.5 V), directly setting full-scale span (2×VREF) and common-mode range. Input coding is two's complement, and serial output delivers four leading zeros followed by 12 MSB-first data bits on SDATA's falling SCLK edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit-supports 4096 discrete digital codes for high-fidelity signal digitization. |
| Max Throughput Rate | 1 MSPS at 5 V / 833 kSPS at 3 V-enables real-time capture of fast transients in motor control or communications. |
| SINAD | 70 dB min at 300 kHz input-ensures ≥8.6 effective bits for accurate dynamic signal representation. |
| Full-Power Bandwidth | 20 MHz typ @ –3 dB-accepts wideband sensor outputs without external anti-alias filtering. |
| Power-Down Current | 1 µA max-extends battery life in portable instrumentation during idle intervals. |
| Reference Range | 100 mV to 3.5 V (5 V supply) or 2.2 V (3 V supply)-allows flexible input scaling from low-noise microvolt-level sensors to industrial ±2.5 V signals. |
| Aperture Jitter | 50 ps typ-limits sampling uncertainty to <0.03 LSB at 100 kHz, preserving ENOB in high-SNR applications. |
Pinout & Package
AD7450AR is housed in an 8-lead SOIC package (SOIC-8), 3.9 mm × 4.9 mm body, 1.27 mm pitch, with standard JEDEC MS-012AC footprint and Gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale span (2×VREF) and common-mode center; must be decoupled with ≥0.1 µF capacitor. |
| VIN+ | Differential analog input (+) | Accepts signal phase-aligned to VIN–; input capacitance = 20 pF (track), 6 pF (hold); requires matched source impedance. |
| VIN– | Differential analog input (–) | Accepts 180° out-of-phase signal; same electrical specs as VIN+; mismatched drive causes DNL/INL degradation. |
| GND | Analog ground reference | Common return for all analog circuitry; must connect to clean analog ground plane-separate from digital ground. |
| CS | Active-low chip select | Initiates conversion on falling edge and frames serial data transfer; minimum pulse width = 10 ns. |
| SDATA | Serial data output | Two's complement 12-bit result, MSB-first, preceded by four leading zeros; three-state controlled by SCLK timing. |
| SCLK | Serial clock input | Drives both data readout and internal conversion timing; supports 4 kHz–18 MHz; determines throughput rate. |
| VDD | Single power supply | 3 V (±10%) or 5 V (±5%); requires 0.1 µF ceramic + 10 µF tantalum decoupling to GND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Successive approximation architecture guarantees deterministic conversion latency-critical for closed-loop motor control timing. |
| Fully differential input | Rejects common-mode noise up to 90 dB (at 10 kHz), doubles dynamic range vs. single-ended, and enables bipolar input configurations. |
| Flexible reference scaling | VREF adjustable from 100 mV to 3.5 V allows optimization of SNR and input range for specific sensor output levels. |
| Low-power serial management | Throughput rate scales linearly with SCLK frequency; power drops proportionally-e.g., 0.53 mW typ at 100 kSPS (3 V). |
| High-speed serial interface | Compatible with SPI, QSPI, and MICROWIRE protocols-simplifies integration with ARM Cortex-M, DSP, and FPGA host controllers. |
Applications
| Transducer Interface | Battery-Powered Systems |
|---|---|
Use Scenario: Digitizing low-level bridge sensor outputs (e.g., load cells, pressure transducers) in industrial weighing equipment. IC Role / Device Role / Timing Role: ADC front-end with differential T/H amplifier captures small-signal variations while rejecting EMI-induced common-mode noise. Use Value: 70 dB SINAD at 300 kHz and 1 µA power-down current enable high-accuracy measurements with multi-year battery life. | Use Scenario: Signal acquisition in handheld multimeters or portable oscilloscope probes operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power 12-bit converter providing precise DC/AC voltage readings with minimal quiescent consumption. Use Value: 3.75 mW max at 833 kSPS (3 V) and programmable shutdown reduce average system power by >99% between samples. |
| Data Acquisition Systems | Motor Control |
Use Scenario: Multi-channel synchronized sampling in PC-based DAQ cards for vibration analysis or acoustic monitoring. IC Role / Device Role / Timing Role: High-throughput SAR ADC delivering deterministic 1 MSPS conversion with zero latency for time-critical waveform capture. Use Value: 20 MHz full-power bandwidth and 50 ps aperture jitter preserve signal integrity for FFT-based spectral analysis up to 100 kHz. | Use Scenario: Real-time current/voltage sensing in field-oriented control (FOC) loops for BLDC or PMSM motors. IC Role / Device Role / Timing Role: Precision ADC capturing phase currents with sub-microsecond timing alignment across multiple channels. Use Value: No pipeline delay ensures immediate feedback for PWM update cycles; differential input rejects gate-drive switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7451AR | Same SOIC-8 package, but includes internal reference (2.5 V); 1 MSPS, 12-bit, differential input; higher typical IDD (2.2 mA vs. 1.8 mA at 1 MSPS). | Eliminates external reference design complexity but reduces flexibility in input range scaling and increases supply current. | Select AD7451AR when reference stability and board space are prioritized over VREF tunability and ultra-low power-down current. |
| ADS7822U | 12-bit, 200 kSPS max, single-ended input, 8-pin SOIC; uses internal reference; lower power (1.2 mW at 200 kSPS) but slower and less noise-immune. | Targeted at cost-sensitive, lower-speed applications where differential noise rejection is not required. | Select ADS7822U only for non-critical, single-ended, sub-200 kSPS applications where budget constraints outweigh performance needs. |
Compared with AD7450AR, AD7451AR trades external reference flexibility for simplified BOM and tighter reference drift, while ADS7822U sacrifices speed, differential capability, and noise immunity for lower cost and power at reduced throughput-making AD7450AR optimal for high-fidelity, noise-prone, medium-to-high-speed measurement systems.
Availability
AD7450AR is available at Aetrix Electronics and suitable for transducer interface, battery-powered instrumentation, and motor control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AD7450AR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD7450AR belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, differential-input data acquisition in demanding industrial and portable environments.
FAQ
What is the maximum input frequency the AD7450AR can accurately digitize?
The AD7450AR has a full-power bandwidth of 20 MHz (–3 dB point), meaning it maintains full-scale amplitude accuracy up to that frequency. For high-fidelity digitization, its 70 dB SINAD is specified at 300 kHz input under 1 MSPS conditions-supporting accurate capture of audio-band and motor-control signals without aliasing when paired with appropriate anti-alias filtering.
Does the AD7450AR require an external reference voltage?
Yes, the AD7450AR requires an external reference voltage applied to the VREF pin. It supports VREF from 100 mV to 3.5 V (with 5 V supply) or up to 2.2 V (with 3 V supply). The reference sets the full-scale input span (2×VREF) and common-mode center; no internal reference is provided-unlike the pin-compatible AD7451AR which integrates a 2.5 V reference.
What package type is used for the AD7450AR?
The AD7450AR is supplied in an 8-lead SOIC package (SOIC-8), compliant with JEDEC MS-012AC outline. It measures 3.9 mm × 4.9 mm with 1.27 mm lead pitch and gull-wing leads-compatible with standard surface-mount assembly processes and PCB footprints used for industry-standard 8-pin ICs.
How does the AD7450AR achieve low power consumption at high throughput?
The AD7450AR achieves low power via adaptive clock management: throughput rate scales directly with SCLK frequency, so reducing SCLK lowers power proportionally (e.g., 0.53 mW typ at 100 kSPS, 3 V). Its dedicated power-down mode draws just 1 µA max, and the SAR architecture eliminates pipeline power overhead-delivering 3.75 mW max at 833 kSPS (3 V) and 9 mW max at 1 MSPS (5 V).
Can the AD7450AR interface directly with an SPI host controller?
Yes, the AD7450AR supports SPI-compatible serial communication using CS, SCLK, and SDATA pins. It outputs 16-bit words (four leading zeros + 12-bit two's complement data) MSB-first on the falling edge of SCLK. It is explicitly designed for SPI, QSPI, and MICROWIRE/DSP interfaces-requiring no protocol translation or glue logic when connecting to microcontrollers like STM32, PIC, or TI C2000 series.
AD7450AR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7450AR FAQ
1.How can I place an order for AD7450AR through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7450AR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD7450AR reliable?
The price and inventory of AD7450AR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7450AR is usually 5 days.
3.What payment methods are accepted for AD7450AR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7450AR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7450AR?
AD7450AR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7450AR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD7450AR?
For technical support, including AD7450AR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7450AR requirements.
6.How does Aetrix verify that AD7450AR is sourced from the original manufacturer or authorized distributors?
All AD7450AR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7450AR meets industry standards.
7.What is the process for return or replacement of AD7450AR?
All AD7450AR units undergo pre-shipment inspection (PSI). If there is an issue with AD7450AR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD7450AR part is unused and in its original packaging.
Return procedure for AD7450AR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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